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author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2021-01-20 01:59:53 +0100 |
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committer | Fernando Sahmkow <fsahmkow27@gmail.com> | 2021-06-16 21:35:02 +0200 |
commit | a11bc4a382ebca52bdf0aab1a9474351e8d85cef (patch) | |
tree | 6392fde60f5ee2e414733a193329e18d7f7fde42 /src/video_core/texture_cache/slot_vector.h | |
parent | vulkan_memory_allocator: Release allocations with no commits (diff) | |
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Diffstat (limited to 'src/video_core/texture_cache/slot_vector.h')
-rw-r--r-- | src/video_core/texture_cache/slot_vector.h | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/src/video_core/texture_cache/slot_vector.h b/src/video_core/texture_cache/slot_vector.h index eae3be6ea..1259e8263 100644 --- a/src/video_core/texture_cache/slot_vector.h +++ b/src/video_core/texture_cache/slot_vector.h @@ -5,6 +5,7 @@ #pragma once #include <array> +#include <bit> #include <concepts> #include <numeric> #include <type_traits> @@ -32,6 +33,60 @@ template <class T> requires std::is_nothrow_move_assignable_v<T>&& std::is_nothrow_move_constructible_v<T> class SlotVector { public: + class Iterator { + friend SlotVector<T>; + + public: + constexpr Iterator() = default; + + Iterator& operator++() noexcept { + const u64* const bitset = slot_vector->stored_bitset.data(); + const u32 size = static_cast<u32>(slot_vector->stored_bitset.size()) * 64; + if (id.index < size) { + do { + ++id.index; + } while (id.index < size && !IsValid(bitset)); + if (id.index == size) { + id.index = SlotId::INVALID_INDEX; + } + } + return *this; + } + + Iterator operator++(int) noexcept { + const Iterator copy{*this}; + ++*this; + return copy; + } + + bool operator==(const Iterator& other) const noexcept { + return id.index == other.id.index; + } + + bool operator!=(const Iterator& other) const noexcept { + return id.index != other.id.index; + } + + std::pair<SlotId, T*> operator*() const noexcept { + return {id, std::addressof((*slot_vector)[id])}; + } + + T* operator->() const noexcept { + return std::addressof((*slot_vector)[id]); + } + + private: + Iterator(SlotVector<T>* slot_vector_, SlotId id_) noexcept + : slot_vector{slot_vector_}, id{id_} {} + + bool IsValid(const u64* bitset) noexcept { + return ((bitset[id.index / 64] >> (id.index % 64)) & 1) != 0; + } + + SlotVector<T>* slot_vector; + SlotId id; + }; + ~SlotVector() noexcept { size_t index = 0; for (u64 bits : stored_bitset) { @@ -70,6 +125,20 @@ public: ResetStorageBit(id.index); } + [[nodiscard]] Iterator begin() noexcept { + const auto it = std::ranges::find_if(stored_bitset, [](u64 value) { return value != 0; }); + if (it == stored_bitset.end()) { + return end(); + } + const u32 word_index = static_cast<u32>(std::distance(it, stored_bitset.begin())); + const SlotId first_id{word_index * 64 + static_cast<u32>(std::countr_zero(*it))}; + return Iterator(this, first_id); + } + + [[nodiscard]] Iterator end() noexcept { + return Iterator(this, SlotId{SlotId::INVALID_INDEX}); + } + private: struct NonTrivialDummy { NonTrivialDummy() noexcept {} @@ -140,7 +209,6 @@ private: Entry* values = nullptr; size_t values_capacity = 0; - size_t values_size = 0; std::vector<u64> stored_bitset; std::vector<u32> free_list; |